I have acquired two Shimano Dura Ace 7400 series hubsets.
Both rear hubs say Dura Ace on one side and Integrated 8 SIS on the other, however one is a 126mm and one is a 130mm. The hub bodys and axles are the only real difference.
Why would a 7 speed hubbody have a hub that says Integrated 8 SIS??? See the pic..
Also, I didn't realize how expensive/difficult it is to get Dura Ace Uniglide cassettes until after I acquired these. So, if anyone is interested the loose one pictured and the front hub that goes with it are for sale or trade.
Thanks.